LinkedIn Carousel Size & Dimensions

Are you trying to find the right size for a LinkedIn carousel? Search for it and you'll get a dozen different answers: 1080 x 1080, 1080 x 1350, 1200 x 1500, A4. Most pages give a number with confidence, and almost none link to anything LinkedIn actually wrote. We wanted one page that separates what LinkedIn says from what is just habit.

Most people assume LinkedIn publishes an official carousel size. It doesn't. When we went through LinkedIn's own help and advertising pages in November 2026, we found firm limits on file size, page count and file type, but no pixel size at all for carousel posts. The size everyone uses, 1080 x 1350, is a sensible convention rather than a requirement.

In this article we'll cover the size to design to, the limits LinkedIn really does set, how carousel ads differ, and what our own data says about how many slides to use. Read on to find out more.

What size is a LinkedIn carousel?

Design each page at 1080 x 1350 pixels (4:5 portrait), or 1080 x 1080 if you want square, and keep every page the same size. LinkedIn doesn't publish a pixel size for carousel posts. Its help page sets limits on the file instead: up to 100 MB, up to 300 pages, and every page the same size.

A LinkedIn carousel (LinkedIn calls it a document post) is a file you upload, usually a PDF, which LinkedIn shows as pages people swipe through in the feed. Because it's a document, not an image, there's no fixed canvas. A page can be any shape you like, as long as all of them match.

Here are the two sizes worth choosing between:

If you only remember one size, make it 1080 x 1350.

What are LinkedIn's official carousel limits?

LinkedIn's help page for sharing a document sets three rules: the file can't exceed 100 MB, it can't exceed 300 pages, and it must be a PDF, PPT, PPTX, DOC or DOCX. It also says a PDF with pages of different sizes must be fit to one page size. Those are the only hard limits LinkedIn states for carousel posts.

All of this comes from LinkedIn's help page on sharing documents in a post, which LinkedIn marks as last updated about three years ago. Its advertising specs for document ads, read in November 2026, repeat the same 100 MB and same-page-size rules, so the two agree.

The same help page suggests adding a title to your document, and it's worth doing: the title is what tells someone what they'll get for swiping.

Should a LinkedIn carousel be square or portrait?

Portrait, at 4:5, for most carousels. On a phone, the feed is a fixed-width column, so a portrait page and a square page are shown at the same width and the portrait one is simply taller. That means more of the screen, and more of the reader's attention, is yours. It's geometry, not an algorithm preference.

There's a second reason 4:5 has become the standard. For ordinary photo posts, LinkedIn's help page on images, last updated about two years ago, accepts aspect ratios from 3:1 wide to 4:5 tall. So 4:5 is the tallest shape LinkedIn supports anywhere else in the feed, which makes it the natural ceiling for a carousel too.

LinkedIn's ads specs list standard paper sizes like A4 and US Letter as accepted page layouts, so a taller page will upload. LinkedIn doesn't say how it fits a page taller than 4:5 onto a phone screen, and we haven't tested it ourselves. If you're designing from scratch, 4:5 is the safer bet.

Square still has its place. A 1080 x 1080 page is easier to lay out, and it reuses cleanly on platforms that prefer square. Pick one and stick with it for the whole carousel. For every other image on LinkedIn, from feed photos to link previews, the LinkedIn image size guide has the full set of dimensions.

What size are LinkedIn carousel ads?

Carousel ads aren't documents at all. They're a paid format made of 2 to 10 separate image cards, and LinkedIn recommends each card is 1080 x 1080 pixels (square), under 10 MB, in JPG, PNG or a non-animated GIF. So if you're making an ad, the advice above for organic carousels doesn't apply.

This is where a lot of the confusing advice online comes from: "carousel" means three different things on LinkedIn, each with its own limits.

The carousel ad figures come from LinkedIn's carousel ads specifications, last updated about a year ago, which also says cards are scaled down to 312 x 312 pixels in the feed. That's small, so keep any text on a card short and big.

If you want to sponsor a swipeable PDF rather than image cards, that's a document ad, and LinkedIn's document ads specs use the same 100 MB and 300-page limits as an ordinary carousel post, with vertical, horizontal or square pages all accepted. For ads, LinkedIn recommends keeping the document under 10 pages.

And if you're weighing a carousel against a set of photos, the guide to how many photos you can post on LinkedIn covers the multi-image format in full.

How many slides should a LinkedIn carousel have?

More than most advice suggests. The common rule is to stay under 10 slides, but in our July 2026 data on 3,532 carousels, longer carousels got more reactions at every step, up to 16 slides and beyond. Use as many as your content needs, and stop when the useful slides run out.

LinkedIn allows up to 300 pages, so the limit is never the problem. The question is how many people will swipe. Here's what we found when we grouped carousels by length:

The typical carousel with 16 or more slides got about twice the reactions of one with 2 to 5. So if your topic has 12 real steps, don't cut it to 8 to hit a number.

As a format, carousels gave a small lift: about 11% more reactions than the same person's text posts, for just over half of the 224 people we could test in our LinkedIn algorithm study of 116,000+ posts. A single image did better. So use a carousel when the content is genuinely step by step, and an image when it isn't.

How do you make a LinkedIn carousel the right size?

Set the page size before you design anything, keep it the same on every slide, and export one PDF. That covers the one page-size rule LinkedIn enforces, and keeps your slides readable on a phone.

1. Set the canvas to 1080 x 1350 pixels (or 1080 x 1080) in your design tool before you start.
2. Use one page size for every slide. LinkedIn requires it for PDFs, so check any slide you pasted in from another deck.
3. Keep text large. Phone screens are small, so each page is shown far smaller than you designed it. Thin type below roughly 24 pixels at full size gets hard to read.
4. Export as a single PDF and check the file is under 100 MB. If it is over, compress the photos on the slides rather than cutting slides.
5. Give the document a title when you upload it, as LinkedIn suggests, so readers know what they'll get for swiping.

The full walkthrough, from the first slide to a live post, is in our guide to making a LinkedIn carousel step by step, which also shows how the carousel looks once it's posted.

If you'd rather go portrait, the Flypost app has 1080 x 1350 carousel templates built around a real image on every slide.

LinkedIn carousel size: quick reference

We recheck these limits whenever LinkedIn changes its help pages.

How we checked LinkedIn carousel sizes

Every limit on this page comes from LinkedIn's own pages, read on 12 November 2026: its help page on sharing documents in a post, its marketing help page on carousel ad specifications, its document ads specs page, and its help page on photo requirements. Where LinkedIn doesn't publish something, such as a pixel size for carousel posts, or how it displays a page taller than 4:5, we say so rather than borrowing a number from another tool's blog.

The slide-count figures come from Flypost's study of LinkedIn posts from B2B creators. We grouped 3,532 carousels from our July 2026 sweep (posts from July 2025 to July 2026) by number of pages and compared their typical reactions. Too few people post enough carousels to compare each person against themselves, so that table compares different posts. The carousel versus text figure uses the October 2026 refresh: 116,000+ posts analysed from 2,400+ creators, October 2025 to September 2026, comparing each of 224 people's carousels with their own text posts. The full method is in the LinkedIn algorithm study.